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86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
#ifndef _VM_SCREEN_H_
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#define _VM_SCREEN_H_
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#include <stdbool.h>
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#include <SDL.h>
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#include "vm_area.h"
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#include "vm_bits.h"
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typedef struct {
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/*
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* Red, green, blue
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*/
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vm_8bit r, g, b;
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/*
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* This is alpha, which would be the degree of transparency of the
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* graphics. This is here only if needed--for example, the Apple II
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* doesn't have any alpha channel.
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*/
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vm_8bit a;
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} vm_color;
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typedef struct {
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/*
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* This is the window in SDL that we're displaying. It's fine for a
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* screen to be headless; that is, not to have a window. Screen
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* functions which deal with SDL will simply not run that code if
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* headless.
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*/
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SDL_Window *window;
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/*
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* In SDL, the renderer is comparable to the old SDL_Surface type
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* (which is still there!). A renderer is a little more stateful; it
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* contains its own color information to be used when rendering
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* shapes, for example.
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*/
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SDL_Renderer *render;
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/*
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* These are the x and y coordinates of the window we're creating.
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* FIXME: this should probably be renamed to width and height...
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*/
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int xcoords;
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int ycoords;
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/*
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* Hang onto the last key pressed and the status of whether a key
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* is pressed right now or not.
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*/
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vm_8bit last_key;
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bool key_pressed;
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/*
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* Is the screen dirty? That is to say, has something about it
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* changed that now requires we redraw the screen?
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*/
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bool dirty;
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/*
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* Should we exit (the next chance we get)?
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*/
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bool should_exit;
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} vm_screen;
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extern bool vm_screen_active(vm_screen *);
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extern bool vm_screen_dirty(vm_screen *);
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extern bool vm_screen_key_pressed(vm_screen *);
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extern char vm_screen_last_key(vm_screen *);
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extern int vm_screen_add_window(vm_screen *, int, int);
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extern int vm_screen_init();
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extern int vm_screen_xcoords(vm_screen *);
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extern int vm_screen_ycoords(vm_screen *);
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extern vm_screen *vm_screen_create();
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extern void vm_screen_draw_rect(vm_screen *, vm_area *);
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extern void vm_screen_finish();
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extern void vm_screen_free(vm_screen *);
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extern void vm_screen_prepare(vm_screen *);
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extern void vm_screen_refresh(vm_screen *);
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extern void vm_screen_set_color(vm_screen *, vm_color);
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extern void vm_screen_set_logical_coords(vm_screen *, int, int);
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#endif
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